30年来东北农牧交错区生态系统服务价值变化估算及其空间特征分析——以吉林省通榆县为例

Estimation of Ecosystem Service Value Change and Its Spatial Characteristics in Northeast Farming Pastoral Ecotone in the Past 30 Years:Taking Tongyu County of Jilin Province as an Example

以吉林省通榆县为研究区域,采用1986年和2015年的土地利用数据、DEM数据、1∶10 000基础比例尺地形图数据、土壤数据,通过生态系统服务价值系数和GIS空间分析技术,对该区域不同类型的生态系统服务价值进行了估算,分析了近30年来不同类型生态系统服务价值的变化情况并对其变化特征的空间分异进行了研究。结果表明,近30年来,林地和草地的面积变化对生态系统的服务价值影响显著;从土壤类型上看,黑钙土、石灰性黑钙土、淡黑钙土、草甸钙土等的生态系统服务价值有明显升高;坡度在0-2°范围的生态服务价值明显降低;距离水系、居民地越远,生态服务价值呈逐步下降趋势。

Taking Tongyu county of Jilin province as the study area,using land use data,DEM data,1:10000 basic scale topographic map data and soil data in 1986 and 2015,the value of different types of ecosystem services in this area was estimated through ecosys-tem service value coefficient and GIS spatial analysis technology.This paper analyzes the changes of service value of different types of ecosystems in recent 30 years,and studies the spatial differentiation of their change characteristics.The results showed that the area changes of forest land and grassland had a significant impact on the service value of ecosystems in recent 30 years;from the perspec-tive of soil types,the ecosystem service value of chernozem,calcareous chernozem,light chernozem,meadow calcareous soil,etc.has increased significantly;the value of ecological services decreased significantly where the slope was in the range from O°to 2°;the farther away from water systems and residential areas,the value of ecological services is gradually declining.